2026 · 소스북(플레이 향상용 규칙/옵션)

The Fireball and Candle: A Binary Star System

A worldbuilding reference for creating a realistic two-star mini-cluster that can be reached using present-day Earth-level technology. It describes an M5 red dwarf system with closely spaced worlds and an A5 blue-white star system, along with their habitable zones, planets, and travel relationships. The booklet explains how days, nights, twilight, moon phases, double rainbows, sky colours, and seasonal or orbital effects appear under two suns. It also includes system statistics, setting prompts, planetary options, galactic background details, measurement guidance, equations, and a glossary for adapting the systems to a science-fiction setting.

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